Add a new system runtime plugin type - just the top level
class, not any actual plugin implementation yet.
<rdar://problem/15314068> 

llvm-svn: 194044
diff --git a/lldb/source/Target/SystemRuntime.cpp b/lldb/source/Target/SystemRuntime.cpp
new file mode 100644
index 0000000..ceec6b6
--- /dev/null
+++ b/lldb/source/Target/SystemRuntime.cpp
@@ -0,0 +1,67 @@
+//===-- SystemRuntime.cpp ---------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/lldb-private.h"
+#include "lldb/Target/SystemRuntime.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Core/PluginManager.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+SystemRuntime*
+SystemRuntime::FindPlugin (Process *process)
+{
+    SystemRuntimeCreateInstance create_callback = NULL;
+    for (uint32_t idx = 0; (create_callback = PluginManager::GetSystemRuntimeCreateCallbackAtIndex(idx)) != NULL; ++idx)
+    {
+        std::unique_ptr<SystemRuntime> instance_ap(create_callback(process));
+        if (instance_ap.get())
+            return instance_ap.release();
+    }
+    return NULL;
+}
+
+
+//----------------------------------------------------------------------
+// SystemRuntime constructor
+//----------------------------------------------------------------------
+SystemRuntime::SystemRuntime(Process *process) :
+    m_process (process)
+{
+}
+
+//----------------------------------------------------------------------
+// Destructor
+//----------------------------------------------------------------------
+SystemRuntime::~SystemRuntime()
+{
+}
+
+void
+SystemRuntime::DidAttach ()
+{
+}
+
+void
+SystemRuntime::DidLaunch()
+{
+}
+
+void
+SystemRuntime::ModulesDidLoad (ModuleList &module_list)
+{
+}
+
+uint32_t
+SystemRuntime::GetStatus (Stream &strm, ExecutionContext &exe_ctx)
+{
+    return 0;
+}
+